<template>
  <div class="login-container">
    <!-- rules 表单验证规则 -->
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      auto-complete="on"
      label-position="left"
    >
      <div class="title-container">
        <h3 class="title">Login Form</h3>
      </div>

      <el-form-item prop="email">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <!-- 是否启用浏览器的自动输入，即历史输入记录 -->
        <el-input
          ref="email"
          v-model="loginForm.email"
          placeholder="email"
          name="email"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <!-- keyup 只有在密码框被选中时，才会生效， v-model 绑定规则 -->
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon
            :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'"
          />
        </span>
      </el-form-item>

      <el-button
        :loading="loading"
        type="primary"
        style="width: 100%; margin-bottom: 30px"
        @click.native.prevent="handleLogin"
        >Login</el-button
      >

      <div class="tips">
        <span style="margin-right: 20px">username: admin</span>
        <span> password: any</span>
      </div>
    </el-form>
  </div>
</template>

<script>
export default {
  name: "Login",
  data() {
    const validateEmail = (rule, value, callback) => {
      const mailReg = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+/;
      if (value === "") {
        callback(new Error("请输入用户邮箱"));
      } else if (!mailReg.test(value)) {
        callback(new Error("请输入正确的邮箱格式"));
      } else {
        callback();
      }
    };
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        // callback(new Error("The password can not be less than 6 digits"));
        callback(new Error("密码不能少于6位 ！！！"));
      } else {
        callback();
      }
    };
    return {
      // 通过该表单提交数据
      loginForm: {
        email: "",
        password: "",
      },
      // 自定义校验规则,自定义校验 callback 必须被调用
      loginRules: {
        // trigger验证触发方式  , blur 为表单失去焦点
        email: [{ required: true, trigger: "blur", validator: validateEmail }],
        password: [
          { required: true, trigger: "blur", validator: validatePassword },
        ],
      },
      loading: false,
      passwordType: "password",
      redirect: undefined,
    };
  },
  watch: {
    // 监听路由，触发时机：凡是进入login 页面触发侦听器, 由于是页面跳转所以不加immediate不会触发
    $route: {
      handler: function (route) {
        console.log("route:", route);
        // 设置组件的自定义属性，逻辑运算route.query 不为空时，再route.query.redirect
        this.redirect = route.query && route.query.redirect;
        console.log("this.redirect", this.redirect);
      },
      immediate: true,
    },
  },
  mounted() {
    //按键事件监听
    this.$nextTick(() => {
      document.onkeyup = (e) => {
        e.code === "Enter" ? this.handleLogin() : "";
      };
    });
  },
  methods: {
    // 切换icon class 并且 切换input type类型为password 还是普通input 达到显示隐藏效果
    showPwd() {
      if (this.passwordType === "password") {
        this.passwordType = "";
      } else {
        this.passwordType = "password";
      }
      // this.$refs.password.focus();
      this.$nextTick(() => {
        this.$refs.password.focus();
      });
    },
    handleLogin() {
      // validate form表单方法，对整个表单进行校验，
      this.$refs.loginForm.validate((valid) => {
        if (valid) {
          this.loading = true;
          this.$store
            .dispatch("user/login", this.loginForm) // 命名空间的modules action 使用路径调用 user/login
            .then(() => {
              this.$router.push({ path: this.redirect || "/" });
              this.loading = false;
            })
            .catch(() => {                 
              this.loading = false;
            });
        } else {
          console.log("error submit!!");
          return false;
        }
      });
    },
  },
};
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg: #283443;
$light_gray: #fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 160px 35px 0;
    margin: 0 auto;
    overflow: hidden;
  }

  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
